There is described a hoisting system and method of lifting that make use of a particular fibre rope. The fibre rope includes a plurality of magnets that are embedded within the fibre rope and spaced apart along the rope with a known axial distance between the magnets. The system may include a fibre rope hoisting speed sensor, and a magnetic field sensor that can sense the presence of the magnetic field of the embedded magnets. Using the sensors, the hoisting speed of the rope may be determined by: measuring the time between the passing of consecutive magnets by using the magnetic field sensor; calculating the distance between consecutive magnets using the hoisting speed sensor and the measured time between the passing of the consecutive magnets; and comparing the calculated distance between the magnets with an original, predefined distance between the magnets.

A magnetic detector includes permanent magnets that magnetize a wire rope W in the longitudinal direction, and a search coil that detects a change in the cross sectional area of the wire rope W magnetized by the permanent magnets. The magnetic detector is provided so as to surround a part of the wire rope W. Prior to inspection, the magnetic detector is moved back and forth at least three times across an inspection range of the wire rope W. After the magnetic detector is moved back and forth, the change in the cross sectional area, that is, damage to the wire rope W is inspected by using signals outputted from the search coil.

A rotating movable body for a wire rope includes a rotating portion through the interior of which a wire rope passes, the wire rope being formed by twisting together eight strands, and rotary plates provided on the rotating portion so as to engage with parts of the outer shape of the wire rope, wherein the rotary plates are arranged at a predetermined interval in the extension direction of the wire rope, and in a state where each of the plurality of strands is in contact with one of the rotary plates, the rotating portion moves in the extension direction of the wire rope and rotates so as to follow the twist of the strands.

Methods and devices detect a deterioration state of a load bearing capacity in an elevator suspension member arrangement having several suspension members, such as belts, including electrically conductive cords incorporated into an elastomer material. Deterioration is determined by applying alternating electric voltages to the cords included in legs of a circuitry. Phase shifts between the alternating voltages, for example by determining sum voltages and/or differential voltages, provide valuable information about a condition of the belt. A fixation arrangement of the suspension member arrangement is adapted to enable or simplify the proposed measurements. Furthermore, counting a number of performed bending cycles provides further information to be taken into account for determining the current deterioration state of the belts. Overall, deteriorations in a suspension member such as broken cords, shunts between cords, connections between cords and ground potential and/or deterioration due to corrosion of cords may be easily detected.

A phase calculation unit (12) calculates, as a first phase, a deflection angle of a first similarity vector having a first similarity and a second similarity calculated by a similarity calculation unit (11) as elements. The phase calculation unit (12) calculates, as a second phase, a deflection angle of a second similarity vector having a third similarity and a fourth similarity calculated by the similarity calculation unit (11) as elements. A period calculation unit (13) calculates a period of a pattern formed on a long body on the basis of the first phase and the second phase calculated by the phase calculation unit (12). An abnormality detection unit (14) detects an abnormality in the long body on the basis of the period calculated by the period calculation unit (13).

System and method for determining real-time sag and shape information of an electrical power line based on strain distribution along a length of an optical fiber associated with the power line. An embedded fiber coupled to an overhead transmission line measures strain using the backscatter of an optical signal, the optical signal is then interrogated using an interferometer.

The invention relates to a sensor device for insertion and for measuring tension within a braided, plaited and/or laid line. The sensor device comprises an elongated sensor housing having an outer housing surface and an inner housing surface and at least one pressure sensor arranged inside the elongated sensor housing. The outer housing surface having a substantially elliptic or circular cross sectional area around the longitudinal axis of the sensor housing. Further, the at least one pressure sensor is configured to allow measurement, at least indirectly, of a pressure exerted on the outer housing surface. The invention also relates to a line sensor assembly for mooring of one or more structures, and a method of adjusting the tension in a line sensor assembly and the use of a line sensor assembly.

The present invention generally relates to the detection of the discard state of high-strength fiber ropes. The invention relates to a device for detecting the discard state of high-strength fiber ropes for various operating conditions, wherein a rope core of the fiber rope is sheathed with a rope sheath which is intended to wear more quickly than the rope core, comprising an optical detection device for detecting the rope surface and/or a load spectrum counter for detecting the load cycles to which the fiber rope is subjected, and on the other hand to a lifting gear such as a crane comprising such a device. According to the invention, there is provided a detection device for detecting the light absorption coefficient and/or the degree of reflection of the rope sheath and an adaptation device for adapting the algorithm, by means of which the discard state is determined, in dependence on the detected light absorption coefficient and/or the detected degree of reflection.

A non-destructive evaluation method for fiber rope comprises the following steps. A rope construction type is identified. An expected life of the rope construction type is determined. At least two characteristics of the rope construction types are identified. A characteristic adjustment factor is stored for at least one of the at least two characteristics. At least one rope characteristic interaction between at least two of the identified rope characteristics is identified. An interaction adjustment factor is stored for the at least one identified rope characteristic interaction. An adjusted remaining life is calculated based the expected life, the at least one characteristic adjustment factor, and the at least one interaction adjustment factor.

A method for determining a deterioration state in a suspension member arrangement having a suspension member including a plurality of electrically conductive cords includes the steps of: counting a number of bending cycles applied to the suspension member; measuring an electrical characteristic of the suspension member upon applying an electrical voltage to at least one of the cords; performing at least one of (a) determining a critical deterioration state upon monitoring both the bending cycles number and the electrical characteristic, and (b) determining an unexpected deterioration state based on deriving a current actual deterioration state of the suspension member based on the electrical characteristic and assuming a currently expected deterioration state based on the bending cycles number and comparing the current actual deterioration state with the currently expected deterioration state; initiating a defined procedure upon determining at least one of the critical deterioration state and the unexpected deterioration state.